GoogleChrome/webrtc — pull request #327 by fippo (2014-12-20 02:31:33+00:00)
Title: adapter.js: also check for mozRTCPeerConnection

apparently there are some custom builds of FF that have disabled webrtc peerconnections but allow GUM. Checking both mozGetUserMedia and mozRTCPeerConnection should catch those as well.

Arguably the same could be done for chromium but...